Latch-hook



C. S- DAHL.

LATCH HOOK.

APPLICATION FILED FEB. 10, I920.

1,358,708. Patented Nov. 16, 1920.

INIENTOR ATTORNEY "rise CARL S. DAHL, 0F DULUTH, MINNESOTA.

LATCH-HOOK.

Application filed February 10, 1920. Serial No. 357,616.

To (ZZZ whom it concern: 1

Be it known that I, CARL S; Darin, a citizen of the United States, residing at Duluth, in the county of St. Louisand State of lliiinnesota, have invented certain new and useful Improvements in Latch-Hooks, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to hooks and has special reference to a locking hook for use in holding twoends of a chain together and is particularly designed for use in conuection with anti-skid chains used on automobile wheels.

The principal object of the invention is to produce an improvement upon'the hooks as are commonly used for such purpose.

Another object is to produce a hook of this character the accidental unlocking of which is rendered practically impossible.

Other objects and advantages of the peculiar construction will appear in the further description thereof.

Referring to the accompanying drawings forming part of this application:

Figure 1 is a side elevation of my improved hook as applied to a chain and locked.

Fig. 2 is a similar View showing the hook unlocked and engaging the opposite ends of a chain, and

Fig. 3 is a plan-view of Fig. 1 taken at right angles thereto and showing a portion of the housing for the locking pin in section.

1 represents the body portion of the hook which comprises an elongated piece of metal bifurcated its entire length except at the end to which it is permanently fixed to the chain 2 where it is provided with an enlarged hub-like portion 3 through which the pin or rivet 1, by which it is attached to the chain 2 passes. The opposite end of the body portion is turned or bent from alinement from the main portion thereof forming a goose neck termination of the body portion as indicated at 5. This is for the purpose of providing a pivotal support as at 6 out of aliuement with the main body portion 1 for the adjustable member or latch 7, the inner end of which latter is also of goose-neck form as at 8. The opposite end of the latch '7 is of a shape to fit readilyintermediate of the bifurcated portions of the body 1 and is provided with a suitable transverse hole 9 which registers with similar hole 10 extending through the body portion when the latch is closed. 7

The extreme termination of the free end of the latch 7 isinclined as at 11, which when" the latch is closed rests normally against the inclined end 1.2 of the channel between the bifurcated portions of the body 1, this being for the purpose of preventing the latch passing wholly through between the two halves of the body 1. l

p The hole 10 is provided upon one side of the body portion with a laterally projecting conically shaped enlargement or hub 13, the hole in the end of which is areduced continuation of the hole 10, and is countersunk forming a suitable seat for the tapered head 14 of the locking pin or bolt 15 which is reciprocably mounted within the hole 10; The end of the pin which engages the V latch when the hook is locked and extends through into the opposite side of the body 1 is larger in diameter than that portion normally remaining within the hub 13 thus forming an annular shoulder upon the pin as indicated at 16. Intermediate of this shoulder and the outermost end of the larger portion of the hole 10 is installed an expansive spiral spring 17 which normally acts to keep the pin in its locked position and when in such position the head 14 of the pin forms a complete closure for the countersunk end of the hub 13 which results in a smooth flush outer termination of the hub 13 and the pin being non-accessible from such point.

In construction the pin 15 is first completely formed without the head 14 when the spring 17 is applied to the reduced end thereof and the pin applied to the hole 10 from the side of the body 1 opposite to that which carries the integral hub 18, then when by'pressure the pin is held in its fully retarded position the head 14.- may be formed by upsetting or other suitable means.

By this arrangement it is evident that the only possible way of withdrawing the pin from engagement with the hole in the latch when the latter is in locked position, is by the use of a pin, nail, match or the like thrust into the open end of the hole 10 upon the side of the body 1 opposite to that upon which the hub 13 is formed. In

this manner the influence of the spring 17 11c may be conteracted and the latch raised after having been freed from contact with i V the pin and the same IIlGthOClIIlllSt be em- "ployedtin locking the latch in position, thus 5 rendering it practically impossible for the latch to be either locked or unlocked Without the use of some small article such as above referred to for forcingthe pin backwardlyagainst the spring. i

I 10 It may be here stated that While this positive locking feature at first glance may seem objectionable, attention is called to the fact that the many losses, annoyances and damages resulting from the accidental un- 7 1 5 locking of such 'ahook' are far moreob-f je'ctionablle and to be avoided possible.

' From the peculiar semi-circular shape of the pivotalend of the latch 7 it is evident that the opposite free end of a chain to 2 0 which the hook is fixed may be engaged by the free end of the latch when in a slack position and drawn taut by the closing-of the latch, as clearly illustrated in the drawings.

3 It is to; be understood that Various modi- V fications and changes'ln the structure here to thesimilarlyshaped end of the body portion and registerable intermediate of the spaced parts of the body, portion, .a' hole within the free end of the latch, transversely disposed holes through the body-portion and with which the hole the latch is register able and a spring actuated boltwithin the hole in the body portion for through en-' gagement with {the latchji-said bolt being adjustable only by fmean's axially, applied thereto, substantially as described. I In ftest inonywhereof l hereunto my signature 1n th'eip'res'ence of two wltnesses.

" CARDS. DAHL.

"i vitne sse's:- i

' C. Gonoom.

S. GEO. STEVENS. 

